diff --git a/litellm/main.py b/litellm/main.py
index 46a024a7631..6cdba2e8e25 100644
--- a/litellm/main.py
+++ b/litellm/main.py
@@ -85,6 +85,10 @@ from litellm.litellm_core_utils.prompt_templates.common_utils import (
 from litellm.llms.base_llm import BaseConfig, BaseImageGenerationConfig
 from litellm.llms.bedrock.common_utils import BedrockModelInfo
 from litellm.llms.custom_httpx.http_handler import AsyncHTTPHandler, HTTPHandler
+from litellm.llms.vertex_ai.common_utils import (
+    VertexAIModelRoute,
+    get_vertex_ai_model_route,
+)
 from litellm.realtime_api.main import _realtime_health_check
 from litellm.secret_managers.main import get_secret_bool, get_secret_str
 from litellm.types.router import GenericLiteLLMParams
@@ -150,7 +154,6 @@ from .llms.bedrock.chat import BedrockConverseLLM, BedrockLLM
 from .llms.bedrock.embed.embedding import BedrockEmbedding
 from .llms.bedrock.image.image_handler import BedrockImageGeneration
 from .llms.bytez.chat.transformation import BytezChatConfig
-from .llms.lemonade.chat.transformation import LemonadeChatConfig
 from .llms.codestral.completion.handler import CodestralTextCompletion
 from .llms.cohere.embed import handler as cohere_embed
 from .llms.custom_httpx.aiohttp_handler import BaseLLMAIOHTTPHandler
@@ -162,6 +165,7 @@ from .llms.gemini.common_utils import get_api_key_from_env
 from .llms.groq.chat.handler import GroqChatCompletion
 from .llms.heroku.chat.transformation import HerokuChatConfig
 from .llms.huggingface.embedding.handler import HuggingFaceEmbedding
+from .llms.lemonade.chat.transformation import LemonadeChatConfig
 from .llms.nlp_cloud.chat.handler import completion as nlp_cloud_chat_completion
 from .llms.oci.chat.transformation import OCIChatConfig
 from .llms.ollama.completion import handler as ollama
@@ -192,6 +196,7 @@ from .llms.vertex_ai.multimodal_embeddings.embedding_handler import (
 from .llms.vertex_ai.text_to_speech.text_to_speech_handler import VertexTextToSpeechAPI
 from .llms.vertex_ai.vertex_ai_partner_models.main import VertexAIPartnerModels
 from .llms.vertex_ai.vertex_embeddings.embedding_handler import VertexEmbedding
+from .llms.vertex_ai.vertex_gemma_models.main import VertexAIGemmaModels
 from .llms.vertex_ai.vertex_model_garden.main import VertexAIModelGardenModels
 from .llms.vllm.completion import handler as vllm_handler
 from .llms.watsonx.chat.handler import WatsonXChatHandler
@@ -255,6 +260,7 @@ vertex_multimodal_embedding = VertexMultimodalEmbedding()
 vertex_image_generation = VertexImageGeneration()
 google_batch_embeddings = GoogleBatchEmbeddings()
 vertex_partner_models_chat_completion = VertexAIPartnerModels()
+vertex_gemma_chat_completion = VertexAIGemmaModels()
 vertex_model_garden_chat_completion = VertexAIModelGardenModels()
 vertex_text_to_speech = VertexTextToSpeechAPI()
 sagemaker_llm = SagemakerLLM()
@@ -2875,7 +2881,7 @@ def completion(  # type: ignore # noqa: PLR0915
                 extra_headers=headers,
             )
 
-        elif custom_llm_provider == "vertex_ai":
+        elif custom_llm_provider == "vertex_ai":          
             vertex_ai_project = (
                 optional_params.pop("vertex_project", None)
                 or optional_params.pop("vertex_ai_project", None)
@@ -2897,7 +2903,9 @@ def completion(  # type: ignore # noqa: PLR0915
             api_base = api_base or litellm.api_base or get_secret("VERTEXAI_API_BASE")
 
             new_params = safe_deep_copy(optional_params or {})
-            if vertex_partner_models_chat_completion.is_vertex_partner_model(model):
+            model_route = get_vertex_ai_model_route(model=model, litellm_params=litellm_params)
+            
+            if model_route == VertexAIModelRoute.PARTNER_MODELS:
                 model_response = vertex_partner_models_chat_completion.completion(
                     model=model,
                     messages=messages,
@@ -2918,10 +2926,7 @@ def completion(  # type: ignore # noqa: PLR0915
                     timeout=timeout,
                     client=client,
                 )
-            elif "gemini" in model or (
-                litellm_params.get("base_model") is not None
-                and "gemini" in litellm_params["base_model"]
-            ):
+            elif model_route == VertexAIModelRoute.GEMINI:
                 model_response = vertex_chat_completion.completion(  # type: ignore
                     model=model,
                     messages=messages,
@@ -2943,7 +2948,29 @@ def completion(  # type: ignore # noqa: PLR0915
                     api_base=api_base,
                     extra_headers=headers,
                 )
-            elif "openai" in model:
+            elif model_route == VertexAIModelRoute.GEMMA:
+                # Vertex Gemma Models with custom prediction endpoint
+                model_response = vertex_gemma_chat_completion.completion(
+                    model=model,
+                    messages=messages,
+                    model_response=model_response,
+                    print_verbose=print_verbose,
+                    optional_params=new_params,
+                    litellm_params=litellm_params,  # type: ignore
+                    logger_fn=logger_fn,
+                    encoding=encoding,
+                    api_base=api_base,
+                    vertex_location=vertex_ai_location,
+                    vertex_project=vertex_ai_project,
+                    vertex_credentials=vertex_credentials,
+                    logging_obj=logging,
+                    acompletion=acompletion,
+                    headers=headers,
+                    custom_prompt_dict=custom_prompt_dict,
+                    timeout=timeout,
+                    client=client,
+                )
+            elif model_route == VertexAIModelRoute.MODEL_GARDEN:
                 # Vertex Model Garden - OpenAI compatible models
                 model_response = vertex_model_garden_chat_completion.completion(
                     model=model,
@@ -2965,7 +2992,7 @@ def completion(  # type: ignore # noqa: PLR0915
                     timeout=timeout,
                     client=client,
                 )
-            else:
+            else:  # VertexAIModelRoute.NON_GEMINI
                 model_response = vertex_ai_non_gemini.completion(
                     model=model,
                     messages=messages,